Sylvia Rose16 hours ago4 minCorundum: Secrets of Valuable GemstonesCorundum is a mineral composed of aluminum oxide. Living deep within the Earth in an environment of intense heat and pressure, the...
Sylvia RoseSep 13 minScience of Rust Earth Pigments & ColorsRust is a complex chemical reaction from the interaction of iron, oxygen, and moisture. This common phenomenon produces striking colors...
Sylvia RoseSep 13 minGoethite: The Other Iron-Rich MineralGoethite is common but like hematite a remarkable iron oxide mineral. In geology and mineralogy, goethite has piqued the interest of...